An air-operated hammer, comprising a hollow ram; a frame; an air cylinder and piston assembly disposed within the ram, wherein a top of the cylinder and piston assembly is attached to a top of the frame and wherein a piston rod of the cylinder and piston assembly is attached to a bottom of the ram; an air flow control valve mounted on and in fluid communication with a manifold disposed on a top of the frame; a first pressurized air reservoir comprising a first flexible hose of a first size attached to an outside surface of the frame, wherein lifting of the ram is caused by pressurized air from the pressurized air reservoir being supplied to and entering a bottom of the cylinder, wherein pressurized air entering a bottom portion of the cylinder causes the piston to raise the ram.

An air-operated hammer, comprising a hollow ram; a frame; an air cylinder and piston assembly disposed within the ram, wherein a top of the cylinder and piston assembly is attached to a top of the frame and wherein a piston rod of the cylinder and piston assembly is attached to a bottom of the ram; an air flow control valve mounted on and in fluid communication with a manifold disposed on a top of the frame; a first pressurized air reservoir comprising a first flexible hose of a first size attached to an outside surface of the frame, wherein lifting of the ram is caused by pressurized air from the pressurized air reservoir being supplied to and entering a bottom of the cylinder, wherein pressurized air entering a bottom portion of the cylinder causes the piston to raise the ram.

An impact tool for machining workpieces has an impact mechanism which is arranged in a housing and is suitable for transmitting an oscillating movement to a machining tip arranged in an axial direction, wherein the impact mechanism can be displaced against the housing between a lower stop point and an upper stop point in the axial direction, wherein a device for generating a constant or variable contact pressure of the machining tip is arranged between the housing and the impact mechanism, such that after a prestressing path of the impact mechanism from the lower stop point, the machining tip is additionally subjected to the contact pressure.

A two-step auto stroke hydraulic breaker includes a cylinder including a high-low pressure chamber, a high pressure chamber, and a pressure converting chamber including a pilot port, a high pressure connecting port connected to the high pressure chamber, a sensing port, an oil tank port, a long stroke port, and a short stroke port, a piston including small diameter portions, upper and lower large diameter portions, a sensing fluid groove between the upper and lower large diameter portions, and a return fluid groove formed on the lower the large diameter portion, a fluid circuit unit to control a supply direction of the fluid to the cylinder and to generate a fluid pressure to selectively change a stroke, and a chisel to break the bedrock when a lower portion of the piston descends to impact the chisel during a descending operation.

An air-operated hammer, comprising a hollow ram; a frame; an air cylinder and piston assembly disposed within the ram, wherein a top of the cylinder and piston assembly is attached to a top of the frame and wherein a piston rod of the cylinder and piston assembly is attached to a bottom of the ram; an air flow control valve mounted on and in fluid communication with a manifold disposed on a top of the frame; a first pressurized air reservoir comprising a first flexible hose of a first size attached to an outside surface of the frame, wherein lifting of the ram is caused by pressurized air from the pressurized air reservoir being supplied to and entering a bottom of the cylinder, wherein pressurized air entering a bottom portion of the cylinder causes the piston to raise the ram.

An air-operated hammer, comprising a hollow ram; a frame; an air cylinder and piston assembly disposed within the ram, wherein a top of the cylinder and piston assembly is attached to a top of the frame and wherein a piston rod of the cylinder and piston assembly is attached to a bottom of the ram; an air flow control valve mounted on and in fluid communication with a manifold disposed on a top of the frame; a first pressurized air reservoir comprising a first flexible hose of a first size attached to an outside surface of the frame, wherein lifting of the ram is caused by pressurized air from the pressurized air reservoir being supplied to and entering a bottom of the cylinder, wherein pressurized air entering a bottom portion of the cylinder causes the piston to raise the ram.

A two-step auto stroke hydraulic breaker includes a cylinder including a high-low pressure chamber, a high pressure chamber, and a pressure converting chamber including a pilot port, a high pressure connecting port connected to the high pressure chamber, a sensing port, an oil tank port, a long stroke port, and a short stroke port, a piston including small diameter portions, upper and lower large diameter portions, a sensing fluid groove between the upper and lower large diameter portions, and a return fluid groove formed on the lower the large diameter portion, a fluid circuit unit to control a supply direction of the fluid to the cylinder and to generate a fluid pressure to selectively change a stroke, and a chisel to break the bedrock when a lower portion of the piston descends to impact the chisel during a descending operation.

An impact tool includes a cylindrical body having an internal chamber, a piston assembly positioned within the internal chamber, the piston assembly having a piston base and a piston rod, an adapter arranged on the cylindrical body and having external threads, and a location tip assembly having an opening and having internal threads couplable to the adapter by engaging the external threads relative to the internal threads to create a threaded connection, the threaded connection allows the location tip assembly to be moved axially to a selectable height. An impact tip coupled to an end of the piston rod. Upon introduction of pressurized air within the internal chamber, the piston assembly moves axially towards the adapter causing the impact tip to move axially through the opening towards a surface resulting in impact with the surface to be dented.

An impact tool includes a cylindrical body having an internal chamber, a piston assembly positioned within the internal chamber, the piston assembly having a piston base and a piston rod, an adapter arranged on the cylindrical body and having external threads, and a location tip assembly having an opening and having internal threads couplable to the adapter by engaging the external threads relative to the internal threads to create a threaded connection, the threaded connection allows the location tip assembly to be moved axially to a selectable height. An impact tip coupled to an end of the piston rod. Upon introduction of pressurized air within the internal chamber, the piston assembly moves axially towards the adapter causing the impact tip to move axially through the opening towards a surface resulting in impact with the surface to be dented.